i see...
i noticed that the autobuild feature is active, the reason why it did not work was a misconfiguration. i was a bit misguided by a
post i read recently, which mentioned that auto-build was not available.
the auto-build even responds quicker as eclipse does (maybe for the inside-memory reason), which is great. and no explicit save is neccessary anymore, which is fantastic (inside eclipse every time a do an edit i just do this annoying standard <Strg>+S)).
i really start to like this IDE, let's see what the evaluation month brings more...